CN203349678U - Heat exchanger for boiler and heat exchanger component - Google Patents

Abstract

The utility model relates to a heat exchanger for a home use type gas boiler and a heat exchanger component. The heat exchanger comprises a snakelike pipeline, the snakelike pipeline comprises a plurality of straight pipes (2) with an oval cross section, and the straight pipes are connected with U-shaped connectors (3). Inlet openings (4) and outlet openings (5) are formed in the end portions of the snakelike pipelines. Baffles (6) are inserted into one or more of the straight pipes (2). Fin components (7) are connected to the outer sides of the straight pipes (2) and between end plates (9a, 9b), and comprise a plurality of flat sheets (8) which are provided with oval openings and are arranged with equal distances, and the straight pipes (2) penetrate through the oval openings. The edges of the oval openings are matched with the outer contour of the straight pipes (2). The heat exchanger (1) is completely made of aluminum, and one or more of the components are coated by soldering fluxing agents based on aluminum alloy and are soldered with one another. The heat exchanger is low in cost and light in weight, temperature of soldering is low, and further surface treatment is not needed after the soldering.

Description

Heat exchanger and heat exchanger assemblies for boiler

Technical field

The utility model relates to a kind of heat exchanger for boiler and a kind of heat exchanger assemblies.More specifically, the utility model relates to a kind of plate that is used in particular for domestic type boiler (being preferred for hanging gas boiler) and changes formula (monothermal) heat exchanger.

Background technology

The heat exchanger that is used for some type of hanging gas boiler is made of copper fully, and comprises that intricately is configured as the pipeline of coil pipe, and wherein, the end of some straight tubes is connected to crooked connector in couples.Straight tube is provided with fin, and described fin can be polytype.For example, the fin of some types is to be formed by copper sheet row, according to the periphery of pipe, described copper sheet is bored a hole, so that pipe is through these copper sheets.These copper sheets that form fin utilize soldering to couple together by following process and pipe, and described process is provided for welding rod and brazing flux are inserted with in the contiguous and parallel appropriate housings of every straight tube.(approximately 800 ℃) fusing at this soldering flux temperature much lower at the fusing point than copper.Therefore, make the assembly of pipe, fin and soldering flux reach sufficiently high temperature so that then the soldering flux fusing partly is distributed to by this way pipe above and partly is distributed on fin.Subsequently cooling makes between pipe and copper fin and forms stable being connected.Subsequently, copper heat exchanger must be sprayed paint, and for example with stable on heating silicones, sprayed paint, thereby protection copper is avoided the acid corrosion produced by combustion flue gas during for boiler at heat exchanger.

The heat exchanger of the above-mentioned type is manufactured very complex, this is because the brazing flux of having nothing for it but arranges housing, thereby guarantee that flux correctly melts, to guarantee being connected between pipe and fin, and, have to carry out carefully outside and spray paint, thereby guarantee its complete cover heating interchanger, in thering is the zone of unusual narrow space, be also even so, suppose the relatively little and compact conformation of heat exchanger for the domestic type boiler, this very narrow space be very inaccessible.In addition, as the copper of raw material, obvious rise in price having occurred recently, has encouraged thus to adopt more cheap substitution material.

In order to overcome above-mentioned shortcoming, the applicant has developed heat exchanger made of aluminum fully, and description is arranged in WO2007/096700.Confirmed that this heat exchanger has superperformance, and made and may overcome the above-mentioned shortcoming relevant with copper heat exchanger.

The utility model content

A purpose of the present utility model is to improve aluminum heat exchanger, thereby produces the type of manufacturing simpler, more economically.Even more effective heat exchanger when another purpose of the present utility model is to provide a kind of use, especially be easy to assembling and be arranged in boiler.Above-mentioned purpose and apparent other purposes being realized by following heat exchanger according to following detailed description.

The utility model provides a kind of heat exchanger for the domestic type gas fired-boiler, described heat exchanger comprises following parts: monolithic molding is snakelike snake pipe, described snake pipe comprises the many straight pipes with oval cross section, and described pipe couples together by the U-shaped connector in couples in their end, baffle plate, described baffle plate is inserted in one or more pipe in described pipe, fin component, described fin component is connected to the outside of described pipe between two end plates, described two end plates is positioned at the end of described pipe, described fin component comprises a plurality of flat panel, described a plurality of flat panel equidistant placement in parallel with each other is in column and be provided with oval-shaped opening, described pipe is through described oval-shaped opening, the edge of described elliptical openings and the outline of pipe coupling, the outline of described pipe also has oval cross section, heat exchanger is fully made of aluminum, one or more brazing flux and solderings each other that scribble based on aluminium alloy in above-mentioned parts.

Such heat exchanger has following advantage: cost is lower and weight temperature light, soldering is lower and do not need to carry out further surface treatment after soldering.

Preferably, the described pipe of being made by aluminum pipe, at the inside and outside brazing material that all scribbles, connects in order to provide between all parts of heat exchanger simultaneously.

Preferably, described U-shaped connector is inserted into and is soldered in the end of described pipe.

Preferably, the end of described pipe is outstanding in order to form a height from described end plate, and described heat exchanger is positioned at described At The Height on the top edge of combustion chamber of boiler.

Preferably, described heat exchanger also comprises entrance opening and the exit opening of the end that is positioned at snake pipe, and described entrance opening and exit opening insert and be soldered to the end of the described pipe of the end that is positioned at snake pipe.

The utility model provides a kind of heat exchanger assemblies, described heat exchanger assemblies comprises above-mentioned heat exchanger and two joints, described two joints can be arranged on respectively on described entrance opening and described exit opening rotationally, with for described heat exchanger is connected to the fluid supply circuit.

Preferably, described two joints are made by plastic material.

The accompanying drawing explanation

According to the detailed description of carrying out with reference to the accompanying drawings, further feature and advantage of the present utility model will be apparent, and described accompanying drawing provides in the mode of non-limiting example purely, in accompanying drawing:

Fig. 1 is the plane according to heat exchanger of the present utility model;

Fig. 2 is the side view along the heat exchanger of arrow II direction in Fig. 1;

Fig. 3 is the view along the termination of the heat exchanger of the arrow III direction in Fig. 2; With

Fig. 4 is that the heat exchanger in Fig. 1 is arranged on the perspective view in boiler, in order to make explanation, simplifies, and has omitted the fin of heat exchanger.

The specific embodiment

With reference now to accompanying drawing,, a kind of heat exchanger for boiler of Reference numeral 1 whole expression, this boiler is preferably for the domestic type hanging gas boiler of separate unit, and with for heating and/or produce the domestic hot water, this heat exchanger is suitable for being assemblied in combustion chamber C(Fig. 4) in.Heat exchanger 1 comprises many straight pipes 2 basically, and in embodiment in the accompanying drawings, the quantity of pipe is 5, and it can be according to the required specification of heat exchanger and size and quantitatively changes certainly.As will be more easily found out in Fig. 3, pipe 2 has basic oval cross section, although not restriction in the utility model, this is particularly advantageous, because it is easily manufactured and uses, there is good heat exchange performance, and be configured for connecting the good basis structure of the miscellaneous part of heat exchanger 1.

Associated end 2a, 2b place at pipe, pipe 2 connectors of the aluminium by means of U-shaped 3 and each other in connecting over the ground, so that there is two openings 4 being formed on the associated end place and 5 roughly coiled pipe loop, these two openings 4 and 5 flow into and flow out for fluid (normally water), and this fluid is in use along with it is heated by the coiled pipe loop.Preferably the baffle plate 6 of screw type is preferably mounted in pipe 2, so that by fluid, the motion in the coiled pipe loop converts turbulent flow to from laminar flow.

Fin component 7 can increase the exchange surface with flue gas through over-heat-exchanger 1 in use, this fin component is arranged by a plurality of flat panel 8, the plurality of flat panel is equidistantly spaced apart and arrange abreast with spacing very closely each other, thereby produce the gap be rather narrow, during use, flue gas is forced through this gap, and their heats are sent to fin component 7 and therefore send pipe 2 to, and result sends the fluid of circulation in pipe to.Flat panel 8 is extended and is managed 2 through these flat panel on the whole width of heat exchanger 1, and this is because be provided with the respective openings with shape and size corresponding with the periphery of the pipe 2 of preferred oval cross section in each flat panel.In other words,, so that basically there is not space in the shell coupling of the preferred oval rim of each opening of flat panel 8 and pipe 2 through it in the zone 8 that pipe 2 and flat panel 8 link together between them.The end 8 ', 8 ' of flat panel 8 ' preferably be folded into L shaped, in order to form together a kind of subcontinuous transverse wall.

, there are two end plates 9a, 9b in two end 7a, 7b place at fin component 7, manages 2 end 2a, 2b outstanding from this two end plates, as mentioned above, and for being connected to U-shaped connector 3 and opening 4,5.According to a favourable feature, manage 2 end 2a, 2b from the outstanding enough distances of end plate 9a, 9b, be configured for the supporting base of heat exchanger 1 on the combustion chamber C of boiler on the datum plane with the approximate horizontal that meaned by line P-P in Fig. 3 and Fig. 4.U-shaped connector 3 and opening 4,5 in mounted inside to pipe 2 rather than the fact externally be assembled on pipe as the heat exchanger of some known types this result is contributed.In other words, manage the outstanding from end plate 9a, 9b of 2 end 2a, 2b, to determine height P-P, they are in this At The Height location, thereby heat exchanger 1 are supported on the top edge of boiler furnace C.

Very complicated heat exchanger 1(comprises pipe 2; U-shaped connector 3; Opening 4,5; Baffle plate 6; Fin component 7; With end plate 9a, 9b) can be made of aluminum, with similar copper heat exchanger, compare, there is the attendant advantages that cost is lower and weight is lighter.In addition, different from the copper heat exchanger of having to be sprayed paint protect it to avoid acid corrosion, this heat exchanger 1 does not need to carry out further Surface Machining after soldering.

Advantageously, heat exchanger 1 consists of the aluminium part of the soldering flux layer that scribbles low melting point (particularly aluminium alloy).By this way, each assembling parts of heat exchanger 1 well after, heat exchanger 1 can only be heated above soldering flux (approximately 600 ℃) but lower than at the temperature of the fusing point (approximately 660 ℃) of aluminium and realize the simple connection of each parts, thereby eliminated the complicated stage of inserting welding rod and brazing flux, this complicated stage is typical for copper heat exchanger.Another advantage is: with copper heat exchanger, compare, aluminum heat exchanger 1 have to the temperature for carrying out soldering that raises lower (with compare higher than 800 ℃, higher than 600 ℃).

Advantageously, heat exchanger 1 is by forming at the inside and outside pipe 2 that all scribbles brazing material, to build the benchmark pedestal and to make all component of brazed metal heat exchanger simultaneously, no matter be in inside the attached assembly (such as baffle plate 6, U-shaped connector 3 and opening 4,5) of borrowing on pipe 2, or the assembly (such as fin component 7 and end plate 9a, 9b) from external stability to pipe 2.By this way, the production of heat exchanger is easily, fast and therefore economical.

The favourable feature according to another, for being connected to heat exchanger 1 joint 10(Fig. 4 of fluid supply circuit) can be connected to entrance opening 4 and/or exit opening 5.Due to the shape of entrance opening 4 and exit opening 5, these joints 10 can that is to say by angularly directed and unrestricted, and they free to rotate and keep being connected with the leakproof of exit opening 5 with entrance opening 4 simultaneously.These joints 10 also can be made by plastic material, and therefore make other pipe isolation in heat exchanger and boiler, and the material that other pipes in boiler can be different by the material from making heat exchanger is made.

Certainly, in the situation that do not affect principle of the present utility model, according to the content of describing and illustrating, can extensively change on the shape of embodiment and details, and can thereby not exceed scope of the present utility model.

Claims (7)

1. the heat exchanger for the domestic type gas fired-boiler, described heat exchanger comprises following parts: monolithic molding is snakelike snake pipe, described snake pipe comprises the many straight pipes (2) with oval cross section, and described pipe is located to couple together in couples by U-shaped connector (3) at their end (2a, 2b), baffle plate (6), described baffle plate is inserted in one or more pipe in described pipe (2), fin component (7), described fin component is at two end plates (9a, be connected to the outside of described pipe (2) 9b), described two end plates is positioned at the end (2a of described pipe (2), 2b) locate, described fin component (7) comprises a plurality of flat panel (8), described a plurality of flat panel equidistant placement in parallel with each other is in column and be provided with oval-shaped opening, described pipe (2) is through described oval-shaped opening, the outline coupling of the edge of described elliptical openings and pipe (2), the outline of described pipe also has oval cross section, heat exchanger (1) is fully made of aluminum, one or more brazing flux and solderings each other that scribble based on aluminium alloy in above-mentioned parts.

2. heat exchanger according to claim 1, is characterized in that, the described pipe (2) of being made by aluminum pipe, at the inside and outside brazing material that all scribbles, connects in order to provide between all parts of heat exchanger (1) simultaneously.

3. heat exchanger according to claim 1 and 2, is characterized in that, described U-shaped connector (3) is inserted into and is soldered in the end (2a, 2b) of described pipe (2).

4. heat exchanger according to claim 3, it is characterized in that, the end of described pipe (2) (2a, 2b) is outstanding in order to form a height (P-P) from described end plate (9a, 9b), and described heat exchanger (1) is positioned at described At The Height on the top edge of combustion chamber (C) of boiler.

5. heat exchanger according to claim 1, it is characterized in that, described heat exchanger also comprises entrance opening (4) and the exit opening (5) of the end that is positioned at snake pipe, described entrance opening (4) and exit opening (5) insert and are soldered to the end (2a, 2b) of the described pipe (2) of the end that is positioned at snake pipe.

6. a heat exchanger assemblies, described heat exchanger assemblies comprises heat exchanger according to claim 5 and comprises two joints (10), it is characterized in that, it is upper that described two joints (10) can be arranged on respectively described entrance opening (4) and described exit opening (5) rotationally, with for described heat exchanger is connected to the fluid supply circuit.

7. heat exchanger assemblies according to claim 6, is characterized in that, described two joints (10) are made by plastic material.

Images